Analysis of information sources in references of the Wikipedia article "Halftone" in English language version.
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George Meisenbach, Germany, 1882, is usually acclaimed the inventor of the halftone; others say he was anticipated by Fox Talbot, England, 1852; A. J. Berchtold, France, 1855; Edward and James Bullock, England, 1865; Gen. Frederick von Egloffstein, United States, 1865; William A. Leggo, Canada, 1871.